Johnson-Cook dynamic constitutive relationship for TC16 titanium alloy

摘要：

The true stress—strain curves of TC16 alloy with a wide range of strain rates were investigated under uniaxial quasi-static tension and uniaxial dynamic compression with the Instron 8032 test machine and the split Hopkinson bar respectively.The results indicate that the true stress increases with increasing strain rate,while decreases with increasing temperature.Under the 105 s.1 high strain rate and temperature higher than 673 K,the true stress would even be less than that under quasi-static condition.A new method incorporating TC16’s stress—strain curve developing item was proposed to determine the coefficients in J.C model easily and to avoid the estimation of the adiabatic temperature rising.The Johnson.Cook dynamic constitutive relationship for TC16 was obtained for the first time.Good agreement was obtained between the model prediction and the experimental stress—strain curves for TC16 under both quasi-static and dynamic loadings.

关键词： TC16 titanium alloy dynamic constitutive relationship SHPB strain rate temperature

作者: YANG Yang ZENG Yi WANG Bing-feng

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）